Hello list,
I was studying the way to interface foreign functions from common lisp, until
now i can only do it with clisp implementation, i was wondering how can i do the
same in gcl.
the idea is to access functions from a shared library in the example's case it
is the libncurses library.
I am aware of the defentry and c-lines functions in gcl , but until now the
only clear thing i understand : is that with defentry you can access functions
to linked libraries that were chosen in time of compilation of the gcl
implementation. Also c-lines would let me include a chunk of c code.
The idea i repeat is to access a shared library, in the documentation something
is said about faslinks... what i understand is that it only works in BSD
machines...not linux (by the way i am testing this code in linux machine RH9 and
debian)
So back to the question : is there some gcl code equivalent to the cliso one
below???
can i access a shared c library (*.so) from gcl implementation without having to
recompile the gcl implementation to make this links??
---- start lisp code : clisp 2.33 implementation -----
(use-package 'ffi)
(default-foreign-language :stdc)
; Macro to define foreign functions
(defmacro cfunc (lisp-name c-name &key arguments return-type)
`(def-call-out ,lisp-name
(:name ,c-name)
(:library "/lib/libncurses.so")
(:arguments ,@arguments)
,@(if return-type (list `(:return-type ,return-type)))))
; Define the external functions
(cfunc initscr "initscr")
(cfunc refresh "refresh")
(cfunc getch "getch")
(cfunc printw "printw" :arguments ((message c-string)))
(cfunc endwin "endwin")
; use foreign functions from clisp
(initscr)
(printw (format nil "Hello ~2%World"))
(refresh)
(getch)
(endwin)
---- end lisp code -----
Camilo Olarte
Telesat, más fácil...más Internet.
http://www.telesat.com.co/